According to a vendor, it is 750 mAh capacity; I use them for smoke alarms (hardwired installed) and haven't replaced one yet. Generally standard 9v batteries would die after a power outage, ive replaced them all with lithium no problems in since.

are these l522bp-2 the same as advance lithium l522 ?

Nope, different. "9V Ultimate lithium" are Energizer's current product. Energizer '9V Advanced lithium' has been discontinued so I'd bet that those are old stock. Be sure to check the expiration date. BP-2 just indicates there are two batteries in each individual package. No designation, A plain BP, or Bp-1 would indicate a single battery per package. BP4 would be a 4 pack, etc.

Life span in smoke alarms?

Lasted only 1 year 5 months in my smoke detector.

Is there any chance of these batteries used in a smoke detector exploding and causing a fire?

Virtually none. This type of battery constuction is by far the most stable of all common types. These are much safer and more stable than NiMH such as rechargeables or "standard" batteries which are generally Alkaline. I use these in any sensitive devices or devices not used often but important. As such I use these in my own smoke detectors and have never had any issue. For what it is worth I've been a FireFighter for 25+ years, so yes they are safe. The one thing to be aware of is that if your smoke detector is hard wired and requires a rechargeable battery as a backup power source then do not use these. These are not rechargeable batteries.

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Energizer Ultimate Lithium 9 Volt Battery

Product ID: 342662368

Details

Battery cell composition
Lithium Metal
Brand
Energizer
Number of batteries
1 AAA
Recommended uses for product
Smoke
Unit count
1 Count

⏳ultra long-lasting life

⚡9V high voltage power

🪶lightweight 0.08 lbs

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Description

⚡ Energize your essentials with the ultimate power play!

ENDURANCE CHAMPION - Lasts significantly longer than standard batteries—stay unplugged longer
TRUSTED FOR SAFETY - Ideal for smoke detectors and essential home safety devices
TOP RATED RELIABILITY - 4.7-star rating from over 2,300 users proves unmatched dependability
POWER THAT NEVER QUITS - 9 volts of reliable energy for your critical devices
FEATHERLIGHT PERFORMANCE - Ultra-lightweight design at just 0.08 lbs for easy portability

The Energizer Ultimate Lithium 9 Volt Battery delivers superior, long-lasting power with a lightweight lithium metal design. Perfect for high-tech devices and critical safety equipment like smoke detectors, it offers dependable 9V energy with a proven 4.7-star user satisfaction rating.

Specifications

ASIN	B018N7YZL6
Amperage	1 Amps
Antenna Location	Smoke Detectors
Battery Cell Type	Lithium Metal
Best Sellers Rank	#115,929 in Electronics ( See Top 100 in Electronics ) #1,640 in Disposable Household Batteries
Brand	Energizer
Compatible Phone Models	battery powered toys, gaming consoles, high
Customer Reviews	4.7 4.7 out of 5 stars (2,375)
Global Trade Identification Number	00039800911568
Item Dimensions	32 x 13 x 19 millimeters
Item Weight	0.08 Pounds
Manufacturer	Energizer Batteries- Consumables
Model Name	ENR L522BP.H4 LITH 9V-1 EMOD
Model Number	L522BP
Number of Batteries	1 AAA batteries required. (included)
Reusability	Single Use
UPC	039800911568
Unit Count	1 Count
Voltage	9 Volts

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€ 89.41

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Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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